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Keil forum DFU supported with LPC1857 And IAP Command Code 57 (Reinvoke ISP)?

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DFU supported with LPC1857 And IAP Command Code 57 (Reinvoke ISP)?

Scott Hansohn over 12 years ago

I have an LPC1857 device that only supports firmware upgrade via USB0/DFU (hardwired per Table 13 of UM10430).

I'd like the application code to reinvoke ISP USB0/DFU on user command to upgrade firmware.

Q1: Can the Reinvoke ISP (IAP code 57) be used for this, or will that only support ISP via UART0?

Q2: If not, how would I reset the device so it enumerates back as a DFU-mode device. (e.g. invalidate the currently running flash bank so that ISP USB0/DFU mode will be run on the next device reset?)